Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Bozeman you can determine when to plant brussels sprouts by looking at the USDA zone info.

Planting Calendar for Brussels Sprouts

Frost tolerance for brussels sprouts:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Brussels Sprouts do well in mild cold which means that you can plant them a bit earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant brussels sprouts in Bozeman is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant brussels sprouts and expect a good harvest is probably August. You probably don't want to wait any later than that or else your brussels sprouts may not have a chance to grow to maturity. Starting your brussels sprouts indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

The average date of last frost is May 15 in Bozeman. In the coldest months of winter you should expect an average low temperature of -25°F.

Always keep in mind that USDA zone info for Bozeman is just an average and the actual date of last frost changes from year to year. Half of the time in Bozeman last frost occurs after May 15 so always be ready to protect your brussels sprouts if you have a surprise late frost.

USDA Zone Info for Bozeman

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Bozeman

You may be interested in your other planting guides for Bozeman.